Kim - During last month's call there was a discussion regarding using source references in your build. There are two things needed to support generating source references

PDE build must be able to fetch the code from the SCM so that it can build the bundles and generate source references in the manifests of these bundles. By default, PDE build fetches from CVS. There are third party fetch factories for SVN and Git (See bug 289838 for the Git fetch factory which is available from this repo http://download.eclipse.org/egit/pde/updates-nightly. This git fetch factory is used to build Orion as Andrew describes here )

PDE must be able to parse the source references in the manifest and load the source into your workspace from the appropriate SCM. This is the API work that Martin mentioned and is described in bug 326926